soong: Add LINEAGE_VERSION to dumpvars

Change-Id: I24b29442f041aec451a173db404f542060ac67d2
diff --git a/ui/build/dumpvars.go b/ui/build/dumpvars.go
index 285f156..f97f952 100644
--- a/ui/build/dumpvars.go
+++ b/ui/build/dumpvars.go
@@ -139,6 +139,7 @@
 var BannerVars = []string{
 	"PLATFORM_VERSION_CODENAME",
 	"PLATFORM_VERSION",
+	"LINEAGE_VERSION",
 	"TARGET_PRODUCT",
 	"TARGET_BUILD_VARIANT",
 	"TARGET_BUILD_TYPE",